Javascript正则表达式可清洁电子邮件正文

Question

I have about 100 raw emails containing text similar to following:

Seems alright now. You may proceed to file the same. 
Also, please update the status of TDS payment.
Thanks
---------- Forwarded message ---------- 
From: sender@email.com; 
Date: Tue, Mar 21, 2017 at 1:14 PM 
Subject: some subject 
To: abc@gmail.com 
Cc: xyz@ymail.com

What I need to do is to remove forwarded message part from each email and only retain the text written by sender.

Expected Output:

Seems alright now. You may proceed to file the same. 
Also, please update the status of TDS payment.
Thanks

What regex pattern can I use to achieve the expected output??

Answer 1

Try that:

^(?=.*Forwarded message)[^]*

ie in javascript:

'/^(?=.*Forwarded message)[^]*/m;'

Update

You can also try the following regex if you need to consider - :

^(?=\s*[-]+\s*Forwarded message\s*[-]+\s*)[^]*

Replace by:

"" empty

Demo

 const regex = /^(?=.*Forwarded message)[^]*/m; const str = `Seems alright now. You may proceed to file the same. Also, please update the status of TDS payment. Thanks ---------- Forwarded message ---------- From: sender@email.com; Date: Tue, Mar 21, 2017 at 1:14 PM Subject: some subject To: abc@gmail.com Cc: xyz@ymail.com What I need to do is to remove forwarded message part from each email and only retain the text written by sender. Expected Output: Seems alright now. You may proceed to file the same. Also, please update the status of TDS payment. Thanks`; const subst = ``; const result = str.replace(regex, subst); console.log(result);